Acer Altos R710 - Manual (Page 85)

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The minimum memory configuration is one DIMM, installed in DIMM
1B slot. However, for optimum performance and 2-way memory
interleave operation, two DIMMs with identical size should be
installed. DIMMs on memory channel A are paired with DIMMs on
memory channel B to configure 2-way memory interleave.
Both DIMM 1B and 1A must be populated before any DIMMs are
installed. DIMM 2B and DIMM 2A must be populated in pairs.
All DIMMs installed must be identical (same manufacturer, CAS latency,
number of rows, columns and devices, timing parameters, etc.).
Warning! Functionality issues may be encountered if mixed
memory types are installed on the same mainboard. DIMM
modules of identical type, banking and stacking technology, and
anufacturer should be installed in the Altos R710 system.
Memory configurations for the DDR2 DIMMs
The memory modules of identical type, banking, stacking and
manufacturer must be installed and removed in the following order:
• DIMM 1B and DIMM 1A
• DIMM 2B and DIMM 2A
• DIMM 3B and DIMM 3A
Altos R710 includes Memory Sparing and Mirroring support.
Thesefeatures prevent a single memory module failure to occur and
result ina system crash.
Important: Four DIMM population of completely identical devices
(two per channel) are required for memory mirroring and sparing
functionality (i.e., DIMM 1A, 1B, 2A, and 2B must be identical) .
1GB 1GB 1GB 1GB 1GB 1GB 2-way
2GB 2GB 2GB 2GB 2GB 2GB 2-way
DIMM
1B DIMM
1A DIMM
2B DIMM
2A DIMM
3B DIMM
3A Memory
Interleave